Pressure-Volume (PV) Loop Analysis Process

Introduction

The pressure-volume (PV) loop properly describes the performance of the heart as a pump. Left ventricular pressure-volume relationships, expressed as PV loops, yield important hemodynamic information in the cardiac catheterization laboratory.

The PV Loop analysis module permits the display and analysis of left ventricular pressure cycles plotted against cardiac volume cycles within a review session.

Considerations

PV Loop analysis can only be done post-acquisition; however, graphical representation of loops are available for viewing during the acquisition.

The LVP and CVOL analysis modules are required

CVOL Analysis Module must be set to trigger off of LVP channel

Data Acquisition

During Protocol setup, configure the XY-Loop graph to visualize PV Loops during acquisition as outlined below.

Select Setup | P3 Setup | Graph Setup

Enable a graph page by checking the Enable Page check box.

Select XY-Loop from the graph Type dropdown.

Set the XInput to your Volume channel.

Set the YInput to your Pressure channel.

The following is an example of what the XY-Loop graph will look like during the acquisition.

Analysis

Open the Review file (.RVW) generated from the acquisition to enter Ponemah Review and analyze the PV Loop data.